Agreed with the friction around getting started. I would like to see it reduced. It’s cool to see you using them to wrap Python functions - I have done something similar before myself, and still need to get around to shimming Haskell into excel at some point.
Another thing I don’t like is how JavaScript Custom Function cell formulas have a horrible string after the _xldudf marker, which becomes noticeable if your workbook doesn’t/can’t load the custom functions addin (or you unload the addin)
Thanks for your comment
Great to here you praise auth. I almost forgot getting auth ‘right’ inside Excel was a real time burglar.
IMO deployment is an even harder problem. The Office team makes it incredibly difficult to deploy web add-ins (presumably for business reasons) and accordingly most companies I'm familiar with are still using the ancient, barely-supported COM+VSTO add-in models.
That doesn't mean app-store shouldn't be an option. I would love to also publish my add-in in the Microsoft AppStore, but it should be my choice, not a hard-requirement.
That's why people are still using VSTO, not because we have a problem with JavaScript vs. C# or COM.
Compare to VSTO, where IIRC installation just involves editing a registry value to let Office know where your add-in can be found on disk.